fix respond_to without blocks not working if one of the blocks is all

actionpack/CHANGELOG.md

 ## Rails 4.0.0 (unreleased) ##
 
+*   Fix `respond_to` not using formats that have no block if all is present. *Michael Grosser*
+
 *   New applications use an encrypted session store by default.
 
     *Santiago Pastorino*

actionpack/lib/action_controller/metal/mime_responds.rb

@@ -420,7 +420,7 @@ def custom(mime_type, &block)
       end
 
       def response
-        @responses[format] || @responses[Mime::ALL]
+        @responses.fetch(format, @responses[Mime::ALL])
       end
 
       def negotiate_format(request)

actionpack/test/controller/mime_responds_test.rb

@@ -80,6 +80,13 @@ def using_defaults_with_type_list
     respond_to(:html, :xml)
   end
 
+  def using_defaults_with_all
+    respond_to do |type|
+      type.html
+      type.all{ render text: "ALL" }
+    end
+  end
+
   def made_for_content_type
     respond_to do |type|
       type.rss  { render :text => "RSS"  }
@@ -301,6 +308,20 @@ def test_using_defaults
     assert_equal "<p>Hello world!</p>\n", @response.body
   end
 
+  def test_using_defaults_with_all
+    @request.accept = "*/*"
+    get :using_defaults_with_all
+    assert_equal "HTML!", @response.body.strip
+
+    @request.accept = "text/html"
+    get :using_defaults_with_all
+    assert_equal "HTML!", @response.body.strip
+
+    @request.accept = "application/json"
+    get :using_defaults_with_all
+    assert_equal "ALL", @response.body
+  end
+
   def test_using_defaults_with_type_list
     @request.accept = "*/*"
     get :using_defaults_with_type_list

actionpack/test/fixtures/respond_to/using_defaults_with_all.html.erb

+HTML!